Shock-absorber.



R- 3. THOMPSON. SHOCK ABSORBER. APPLICATION FILED FEB. 16,1911,

1,046,900, Patented Dec. 10,1912.

- l? d flun 6.501;,

' FEW ROY JAMES THOMPSON, OF MUSKEGON, MICHIGAN.

SHOCK-ABSORBER.

assoc.

Specification of Letters Patent. Application filed February 16, 1911.

Patented Dec. 10, 1912. Serial No. 609,044.

To all whom it mayconcern:

. Be it/known that I, ROY J. THOMPSON, a citizen of the United States, residing at Muskegon, in the county of Muskegon and State of'fMichigan, have invented certain new and useful'lmprovements in Shock-Absorbers; and I do hereby'declare the following to be a full, clear, and exact description of the invent-ion, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference markedthereon, which form a part of this specification.

This invention relates to new and useful improvements in shoclrabsorbers for vehicles of various kinds, especially'adapted for cars. l s

The invention comprises an apparatus of this nature having-various details of construction and combinations and arrangements of parts which will be hereinafter fully described and then specifically defined in the appendedclaim.

. I illustrate my invention in the accompanying drawings, in which:-

Figure-"r isa plan view partly in section,

showing the application of my device to the draw bar of a coupler. Fig. 2 is a 'plan view partially in section showing the two cylinders with a piston stemhaving twopistons, one movable within each cylinder, and Fig. 3 is sectional view through the two cylinders.

Reference now being Had to the details of the drawings by letter, A designatesta draw bar ofa coupler of any suitable construc which offset or recess is tapered, as shown clearly in Fig. 2 of'the drawings, oneend of the recess being wide'and narrowing to a point at the other. The cylinder Efinstead of having an offset or recess, is provided with a series of apertures-O of different diameters and which pass through thc wall of the cylinder to the atmosphere. It will be noted that the cylinder E is to be utilized in connection with air, whilethe cylinder, D is adapted to contain oil against which cylinder acts in absorbing shock. 1

The operation of the apparatus will .be readily understood and is as follows :-Oil

is placed within the cylinder .1) and, when the plunger is at its farthest'outer'limit or toward'the end of the cylinder-having the the widenect part of the recess or'offset, the

apparatus is in shape for operation. In the eventof av blow being imparted to the piston rod, the plungers will be moved, the one in the cylinder D against the surface of the oil, which latter will be forced from in front of said piston, through the offsetwhich will afford a passageway for the oil from one side of the piston to the other, the flow of the oil, however, being reduced as the piston advances, owing to the narrowing of the walls of the recess. This action being gradual, the shock will readily be absorbed. The action of the piston K within the cylinder E will act in the same manner upon air in advance of the cylinder, causing the same.

to be driven out through the holes in the cylinder to the atmospherasaid holes being graduated. in size in order to restrict the exit of the air and gradually cushion the piston K. The sizes of the recesses and the diameters of said apertures respectively in the two cylinders will depend entirely upon the size ofthe cylinder employed and the 'qualityor thickness of the oil employed. As the cars are drawn forward through the medium of the. couplers, the pistons and rods will be returned to their normal positions and ready to operate'upon, any impact which may come upon the-p ston rod.

What I claim to be new is A' shock absorber comprising a cylinder, 2.

piston rod movable through the opposite ends thereof and mounted in suitably packed glands, said cylinder having an offset with a recess opening from the interior of the into a semi-circular outlined imr'tion, as cylinder and terminating at its bottom in a shown and described.

line coincident with the end of the cylinder, In testimony whereof I herefinto affix my said recess extending from one cylinder end signature in the presence of two Witnesses. to the other and provided with inclined ROY JAMES THOMPSON. ends leading to the bottom of the recess, the Witnesses:

opposite Walls of the latter tapering at one FRANK BABoooK,

end to a point and their other ends merging NORMAN T. THOMSON. 

